Calendering and slitting

Calendering changes coating thickness, particle contact, and pore connectivity, influencing electronic path, ion penetration, and mechanical integrity. Process assessment should not look at one density alone but link wetting, rate, cycling, and later assembly behavior.

Calendered electrodes can change dimension or stress with time, humidity, or later steps. Without measurement position, wait time, and environment records, apparently identical calendering results can show different thickness and tension during assembly.

Slit width, edge condition, dust control, and rewind tension affect later electrode alignment and separator integrity. Investigate deviations with traceable samples and equipment state instead of discovering invisible edge defects only after cell failure.